RIKY DERMAWAN SIPAHUTAR; AHMAD AMIN DALIMUNTHE. Analisis Sistem Operasional Terhadap Ketekunan Kerja Staf Maupun Pegawai Pada BSI KCP Kampung Pajak. J-CEKI : Jurnal Cendekia Ilmiah, [S. l.], v. 1, n. 4, p. 306–317, 2022. DOI: 10.56799/jceki.v1i4.395. Disponível em: https://al-haramjournal.co.id/J-CEKI/article/view/395. Acesso em: 7 aug. 2026.